All OS Green line issue- Share your exp., thoughts and Rant!

From reddit

former display engineer here. The pixels have control rows and columns. The brightness and color of each individual pixel is set by electrical signals at the intersection of these control traces. Anyway, one of your column traces is cracked. Usually, these traces are printed as metallic lines on a plastic flexible cable. If you drop your phone, the components bend and flex slightly, but because the gaps are so small, something touched the flex cable and cracked the metallic trace.

Why does it sometimes magically work again? The two sides of the cracked trace make intermittent contact. The cracks are tiny, maybe 1/50 the width of a hair, so it doesn't take much. Your phone gets hot and the thermal expansion is enough to bridge the gap, or maybe you squeezed the display module a bit and pushed the traces together. Most likely, you'll see the green vertical line appear and disappear.

Can you fix it? No. Finding the crack involves disassembling the display, unfolding the flex cable, and using a high powered microscope to find it. There are other techniques, like heating it with a laser and using a thermal camera to see which trace takes the longest to cool, but all of these require specialized equipment. Then, fixing the trace is basically impossible, given how small the cracks are. You're just as likely to short it to adjacent traces. Anyhow, no, you're going to have to replace the entire display module.
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XpertCrush said:
that's a good move by samsung, but should have included other models too like normal and plus versions of all these series.
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List of models keep changing. Contact Samsung support for up to date list of models. I got screen of my s21fe replaced due to this issue. They replace full display along the frame and battery also. Basically only your motherboard stays.
 
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blr_p said:
What has me concerned is Sammy isn't immune. Starts of magenta then becomes green.
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This is happening with my S22+

First there was one such magenta line then it turned green and extremely bright.

Then there emerged another magenta line.

Unlike One Plus, Samsung doesn’t honour out of warranty claims.

Feels like Samsung is losing the goodwill.
 
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mayank11280 said:
This is happening with my S22+

First there was one such magenta line then it turned green and extremely bright.

Then there emerged another magenta line.

Unlike One Plus, Samsung doesn’t honour out of warranty claims.
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They won't fix your S22+ even though the article says they offering repairs for one generation before yours?

I'm confused with your post
 
XpertCrush said:
that's a good move by samsung, but should have included other models too like normal and plus versions of all these series.
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And the dreaded Fold series too
On a second thought....My gut feeling says that sometime in the future, this green line issue will be investigated, revealing it has always been a manufacturing defect. Additionally, the extent of the conspiracy by major mobile phone companies to sweep it under the rug will also come to light.
 
bigb123 said:
this green line issue will be investigated, revealing it has always been a manufacturing defect.
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There’s no real investigation needed. It’s already clear that these displays are extremely delicate and require careful handling. They cannot withstand shocks or hard presses.

Why wasn’t this issue present in older AMOLED displays?
It’s likely due to newer, cost-efficient manufacturing processes. These methods, while cheaper produces better yield, but seem to compromise durability. Since this problem is widespread across various phone brands, it appears that once a new process is adopted, companies quickly transition to it to cut costs, leaving older, more reliable methods behind.
 
Heisen said:
There’s no real investigation needed. It’s already clear that these displays are extremely delicate and require careful handling. They cannot withstand shocks or hard presses.
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Looks like it.
Heisen said:
Why wasn’t this issue present in older AMOLED displays?
It’s likely due to newer, cost-efficient manufacturing processes. These methods, while cheaper produces better yield, but seem to compromise durability. Since this problem is widespread across various phone brands, it appears that once a new process is adopted, companies quickly transition to it to cut costs, leaving older, more reliable methods behind.
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Lousy :grumpy:

Certainly not cheaper for the user that has to pay to replace the screen.

Rs.14k or thereabouts for an S22 o_O
 
Heisen said:
There’s no real investigation needed. It’s already clear that these displays are extremely delicate and require careful handling. They cannot withstand shocks or hard presses.

Why wasn’t this issue present in older AMOLED displays?
It’s likely due to newer, cost-efficient manufacturing processes. These methods, while cheaper produces better yield, but seem to compromise durability. Since this problem is widespread across various phone brands, it appears that once a new process is adopted, companies quickly transition to it to cut costs, leaving older, more reliable methods behind.
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i am guessing in the sense that a class-action law suit will be filed against these mobile giants. should be done in EU or USA
 
bigb123 said:
i am guessing in the sense that a class-action law suit will be filed against these mobile giants. should be done in EU or USA
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It will likely happen if no recourse is provided. These suits aren't new and have been common in the last decade for the two Korean giants in other sectors
 
Heisen said:
There’s no real investigation needed. It’s already clear that these displays are extremely delicate and require careful handling. They cannot withstand shocks or hard presses.

Why wasn’t this issue present in older AMOLED displays?
It’s likely due to newer, cost-efficient manufacturing processes. These methods, while cheaper produces better yield, but seem to compromise durability. Since this problem is widespread across various phone brands, it appears that once a new process is adopted, companies quickly transition to it to cut costs, leaving older, more reliable methods behind.
Click to expand...
I am also seeing that these are common in displays with higher refresh rates and I haven’t experienced it in any device with 60FPS rates. Especially I am seeing the green line issue to be higher in LTPO displays.

There is something going on with higher refresh rates and LTPO displays.
 
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